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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86cf8c74a1b6cd4a71a49e886355495871736870400262bb0e0f93826a8e7224' 
  AND token = 'ExRr4vBvq6Au8+b9rZ9cVVsri8K7NU1IcKp7z8BTnz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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