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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2eaa68be76635508945cf03ebb3c1edd1b760dc7985f8b00f45a1bb598a6b70' 
  AND token = 'k7koebnCu+8DB2UXhJuSf2qJ+b1z2rJ+QdWdwt29wfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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