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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06fdf38d04b32f34b15aefe36e9d9e5046097c6c453c50a8d315921a75e3359f' 
  AND token = 'EIvmY+LYV6Tkqbt77ztuvy59mtcvfVWV9wJdTeKw+O4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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