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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44eeec42d94a86232c44fb684d700cf186548d38c3e1d4d8d751b3bd1d95676d' 
  AND token = 'zvgm31ZLo95E2cJy5EWVFWTMjepW8tu4UW0W11c5XG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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