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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bab6578354c0efbf125149d9262be0995001bd38f47681e2e18a7b39958fa3e' 
  AND token = 'EvuYxdyv0pNV1Dha53XNu9GRDnDjveG4LtAubYt9XyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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