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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00e4377cf4b1568d679540d524cb8a53b5f919ab0a90190228a1c92ebb280cfd' 
  AND token = 'EX3v9p4HX3aRqZ0S7mjzL9D/Imm8EajXJseT3GcNMK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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