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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44157a1565c9644d1f24269a33626cc5ebc46ab7edc776875bba06007e2417ee' 
  AND token = '6pekcnM19nvN1cGY6PWDZLH/EuxPfycVDiCvL8aRKqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}