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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd724755688be04cb1e4495c0edda19a0c3735937d6ce1cbd0df9f8b25cbd307e' 
  AND token = 'uoVp2wDs/nqFc06auAQDLk13zp3+MPuP6K5jZwW6IRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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