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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aac1a0745a5a4a64586a3f1bb5eda779f88ef971b71f7a582e2570d11f06e3f3' 
  AND token = 'JWPMSokDgXa+LjEZshAmmpii7Cg3f6zC09O5K+uRHF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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